Wikipedia:
Electrification is the process of powering by electricity and, in many contexts, the introduction of such power by changing over from an earlier power source.

Historically:
When speaking historically about technology or economic development, The term “Electrification” usually applies to a region or national economy.

Broadly speaking:
Electrification was the build-out of the electrical generation and electrical power distribution systems that occurred in Britain, the United States, and other now-developed countries from the mid-1880s until around 1950.

The build-out of electrical generation and electrical power distribution systems is still occurring in rural areas and in some developing countries.

What is Electrification in the 21st. Century?

Electrification Today – Is an effort to remove all combustion sources from new buildings. The focus is typically on removing natural gas in new buildings, but it can also include existing buildings and other fuel sources (such as propane and wood).

Electrification is an extension of Zero Net Energy (ZNE), Zero Net Carbon (ZNC), and DE De-carbonization concepts.

What is Decarbonization?

This refers to the reduction and effort to eliminate carbon emissions from buildings and the atmosphere, thereby reducing greenhouse gases (GHG).

The push for DE-Carbonization is accompanied by the expectation that by going electric, carbon emissions would be reduced, which is not always the case.